The On This Day Calendar looks like a geometry and rainbow-happy wall calendar with room for regular ol’ reminders but magic lurks among those handsome shapes. Each day features a black, heat-sensitive square that reveals a historical fact when touched. Once the square cools, the trivia fades away. I’m pretty sure this would brighten any morning and probably make you the hit of the office (if you don’t mind line-ups to fondle your calendar that is…)